| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 09h 36m 25.4069s [1] |
| Declination | –48° 45′ 04.2549″ [1] |
| Apparent magnitude (V) | 6.232 |
| Characteristics | |
| HD 83368A | |
| Spectral type | A8V [1] |
| Apparent magnitude (G) | 6.219 [2] |
| Variable type | Rapidly oscillating Ap |
| HD 83368B | |
| Spectral type | F9V [3] |
| Apparent magnitude (G) | 8.995 [4] |
| Astrometry | |
| HD 83368A | |
| Proper motion (μ) |
RA: -8.16±0.03
mas/
yr
[2] Dec.: -18.85±0.03 mas/ yr [2] |
| Parallax (π) | 14.01 ± 0.03 mas [2] |
| Distance | 232.8 ± 0.5
ly (71.4 ± 0.2 pc) |
| HD 83368B | |
| Radial velocity (Rv) | -4.0±0.3 [4] km/s |
| Proper motion (μ) |
RA: -9.41±0.19
mas/
yr
[4] Dec.: -14.00±0.17 mas/ yr [4] |
| Parallax (π) | 14.31 ± 0.15 mas [4] |
| Distance | 228 ± 2
ly (69.9 ± 0.7 pc) |
| Details | |
| HD 83368A | |
| Mass | 1.78+0.12 −0.17 [5] M☉ |
| Radius | 2.003 [6] R☉ |
| Luminosity (bolometric) | 12.33 [6] L☉ |
| Surface gravity (log g) | 4.2 [6] cgs |
| Temperature | 7650 [6] K |
| Rotation | 2.851976±0.00003 d [6] |
| Rotational velocity (v sin i) | 33.8±1.0 [5] km/s |
| Age | 0.93+0.42 −0.34 [5] Gyr |
| HD 83368B | |
| Surface gravity (log g) | 4 cgs |
| Other designations | |
| HD 83368A: 2MASS J09362541-4845042, TYC 8176-283-1 | |
| HD 83368B: 2MASS J09362537-4845072, Gaia DR2 5410092611662456704, TYC 8176-2818-1 | |
| Database references | |
| SIMBAD | data |
HR 3831, also known as HD 83368, is a binary star system in the southern constellation of Vela at a distance of 233 light years. This object is barely visible to the naked eye as a dim, blue star with an apparent visual magnitude of 6.232. It is approaching the Earth with a heliocentric radial velocity of 4.0±0.3 km/s. [4]
The star system is a visual binary with a 3.29″ projected separation, [6] identified as such in 2002. [7] The larger star, HD 83368A, is a pulsating variable of a rapidly oscillating Ap type. It has a single yet strongly distorted dipole pulsation mode with a frequency of 1427 μHz. [8] The primary star is chemically peculiar, exhibiting spots of enhanced concentrations of lithium, europium and oxygen. [6]
- ^ a b c d "HD 83368". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 30, 2021.
- ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv: 2012.01533. Bibcode: 2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi: 10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ "HD 83368B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 30, 2021.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv: 2012.01533. Bibcode: 2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi: 10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c Sikora, J.; Wade, G. A.; Power, J.; Neiner, C. (2019), "A volume-limited survey of MCP stars within 100 pc – I. Fundamental parameters and chemical abundances", Monthly Notices of the Royal Astronomical Society, 483 (2): 2300–2324, arXiv: 1811.05633, Bibcode: 2019MNRAS.483.2300S, doi: 10.1093/mnras/sty3105
- ^ a b c d e f g Kochukhov, O. (2005), "Pulsational line profile variation of the roAp star HR 3831", Astronomy & Astrophysics, 446 (3): 1051–1070, arXiv: astro-ph/0509446, doi: 10.1051/0004-6361:20053345, S2CID 13102520
- ^ Schöller, M.; Correia, S.; Hubrig, S.; Kurtz, D. W. (2002), "Multiplicity of rapidly oscillating Ap stars", Astronomy & Astrophysics, 545: A38, arXiv: 1208.0480, doi: 10.1051/0004-6361/201118538, S2CID 119311263
- ^ Bigot, L.; Kurtz, D. W. (2011), "Theoretical light curves of dipole oscillations in roAp stars", Astronomy & Astrophysics, 536: A73, arXiv: 1110.0988, Bibcode: 2011A&A...536A..73B, doi: 10.1051/0004-6361/201116981, S2CID 54532822
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 09h 36m 25.4069s [1] |
| Declination | –48° 45′ 04.2549″ [1] |
| Apparent magnitude (V) | 6.232 |
| Characteristics | |
| HD 83368A | |
| Spectral type | A8V [1] |
| Apparent magnitude (G) | 6.219 [2] |
| Variable type | Rapidly oscillating Ap |
| HD 83368B | |
| Spectral type | F9V [3] |
| Apparent magnitude (G) | 8.995 [4] |
| Astrometry | |
| HD 83368A | |
| Proper motion (μ) |
RA: -8.16±0.03
mas/
yr
[2] Dec.: -18.85±0.03 mas/ yr [2] |
| Parallax (π) | 14.01 ± 0.03 mas [2] |
| Distance | 232.8 ± 0.5
ly (71.4 ± 0.2 pc) |
| HD 83368B | |
| Radial velocity (Rv) | -4.0±0.3 [4] km/s |
| Proper motion (μ) |
RA: -9.41±0.19
mas/
yr
[4] Dec.: -14.00±0.17 mas/ yr [4] |
| Parallax (π) | 14.31 ± 0.15 mas [4] |
| Distance | 228 ± 2
ly (69.9 ± 0.7 pc) |
| Details | |
| HD 83368A | |
| Mass | 1.78+0.12 −0.17 [5] M☉ |
| Radius | 2.003 [6] R☉ |
| Luminosity (bolometric) | 12.33 [6] L☉ |
| Surface gravity (log g) | 4.2 [6] cgs |
| Temperature | 7650 [6] K |
| Rotation | 2.851976±0.00003 d [6] |
| Rotational velocity (v sin i) | 33.8±1.0 [5] km/s |
| Age | 0.93+0.42 −0.34 [5] Gyr |
| HD 83368B | |
| Surface gravity (log g) | 4 cgs |
| Other designations | |
| HD 83368A: 2MASS J09362541-4845042, TYC 8176-283-1 | |
| HD 83368B: 2MASS J09362537-4845072, Gaia DR2 5410092611662456704, TYC 8176-2818-1 | |
| Database references | |
| SIMBAD | data |
HR 3831, also known as HD 83368, is a binary star system in the southern constellation of Vela at a distance of 233 light years. This object is barely visible to the naked eye as a dim, blue star with an apparent visual magnitude of 6.232. It is approaching the Earth with a heliocentric radial velocity of 4.0±0.3 km/s. [4]
The star system is a visual binary with a 3.29″ projected separation, [6] identified as such in 2002. [7] The larger star, HD 83368A, is a pulsating variable of a rapidly oscillating Ap type. It has a single yet strongly distorted dipole pulsation mode with a frequency of 1427 μHz. [8] The primary star is chemically peculiar, exhibiting spots of enhanced concentrations of lithium, europium and oxygen. [6]
- ^ a b c d "HD 83368". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 30, 2021.
- ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv: 2012.01533. Bibcode: 2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi: 10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ "HD 83368B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 30, 2021.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv: 2012.01533. Bibcode: 2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi: 10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c Sikora, J.; Wade, G. A.; Power, J.; Neiner, C. (2019), "A volume-limited survey of MCP stars within 100 pc – I. Fundamental parameters and chemical abundances", Monthly Notices of the Royal Astronomical Society, 483 (2): 2300–2324, arXiv: 1811.05633, Bibcode: 2019MNRAS.483.2300S, doi: 10.1093/mnras/sty3105
- ^ a b c d e f g Kochukhov, O. (2005), "Pulsational line profile variation of the roAp star HR 3831", Astronomy & Astrophysics, 446 (3): 1051–1070, arXiv: astro-ph/0509446, doi: 10.1051/0004-6361:20053345, S2CID 13102520
- ^ Schöller, M.; Correia, S.; Hubrig, S.; Kurtz, D. W. (2002), "Multiplicity of rapidly oscillating Ap stars", Astronomy & Astrophysics, 545: A38, arXiv: 1208.0480, doi: 10.1051/0004-6361/201118538, S2CID 119311263
- ^ Bigot, L.; Kurtz, D. W. (2011), "Theoretical light curves of dipole oscillations in roAp stars", Astronomy & Astrophysics, 536: A73, arXiv: 1110.0988, Bibcode: 2011A&A...536A..73B, doi: 10.1051/0004-6361/201116981, S2CID 54532822
| Stars |
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|---|---|---|---|---|---|---|---|---|---|---|---|
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|
Star clusters |
| ||||||||||
| Nebulae |
| ||||||||||
| Galaxies |
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